紫外法与红外法测定石油类的比对研究  

Comparison of Ultraviolet and Infrared Spectrophotometry in the Determination of Petroleum

作　　者：吴嘉鹏 楼振纲 胡笑妍 史斌 WU Jiapeng;LOU Zhengang;HU Xiaoyan;SHI Bin(Zhejiang Environmental Monitoring Engineering Limited Company,Hangzhou,Zhejiang 310012,China)

机构地区：[1]浙江环境监测工程有限公司

出　　处：《中国无机分析化学》2019年第6期78-82,共5页Chinese Journal of Inorganic Analytical Chemistry

基　　金：浙江省环保科研项目(2016A011)

摘　　要：将新近实施用于测定地表水中石油类的紫外分光光度法与红外分光光度法的方法特性参数以及应用于各类实际水样测定进行比对研究。结果表明,两种方法的实际检出限均为0.004 mg/L、测定下限均为0.016 mg/L,加标回收样品紫外法测定结果相对标准偏差为4.2%~6.6%,加标回收率为82.0%~96.0%;红外法相对标准偏差为3.8%~5.5%,加标回收率为82.0%~97.0%,精密度和准确度等性能指标相近,在使用不同萃取方式应用于各种不同来源和组成水体的实际样品测定时,同种方法所得结果相对偏差均小于10%,但紫外分光光度法所得结果与红外分光光度法最大相对偏差达到了49.0%,并且红外分光光度法测定结果较之紫外分光光度法与样品理论浓度值更为接近,表明紫外分光光度法对较复杂水体石油类样品的测定存在局限性。The work reports the performance comparison of ultraviolet and infrared spectrophotometry in the determination of Petroleum in water samples.The limits of detection(LOD)are 0.004 mg/L,and the limits of quantification(LOQ)are 0.016 mg/L for both two methods.The mean recovery ranges from 82.0%to 96.0%,and the relative standard deviation(RSD)is between 4.2%to 6.6%for ultraviolet spectrophotometry method,while the mean recovery ranges from 82.0%to 97.0%,and the RSD is between 3.8%to 5.5%for infrared spectrophotometry method.There is no significant difference in the precision and accuracy between this two methods.The RSD is less than 10%for either of these ways by using different extraction method.The maximum relative deviation betweem these two methods reaches 49.0%,however,the results derived from infrared method is more close to the theoretical concentration,indicating that ultraviolet spectrophotometry has limitations in quantifying petroleum in more complex water bodies.

关 键 词：紫外分光光度法 红外分光光度法 石油类测定 

分 类 号：O657.32[理学—分析化学] TH744.12[理学—化学]